I'm making a table to keep track of deposits, credits, etc for a bank
account, with a running balance. Here is the basic layout:

Column b = date of entry
Column c = credits
Column d = deposits
Column e = bank fees
[ Column F & G = other info, not relevant here ]
Column H = Running balance

Each row/entry will be a single transaction. It may have the same date as
another entry, because there might be several deposits, credits, bank fees on
a given day. So for example, there might be 3 entries on 7/25/07.

But for each entry, only 1 of C-D-E will have a number-value for a given
entry. I'd like to have column H look at c, d, and e and add or subtract
whichever one has info in it from the previous cell in Column H. I was
thinking that I could make H have a formula that would say "Subtract the
sum-total of C-D-E from the previous cell". But I can't figure out how to do
this. Any relatively easy way to do this, or otherwise achieve my goal of a
running balance that auto-corrects as I add/delete entries over time?